Fixing means for the sights of firearms.



K. A. BRKUNING. FIXING MEANS FOR. THE SIGHTS OP FIREARMS.

APPLIOATION FILED NOV. 10, 1913.

1,101,163. Patented June 23,1914.

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KARL AUGUST BRAUNING, OF HERSTAL, BELGIUM.

FIXING MEANS FOR THE SIGHTS 0F FIREARMS.

Specification of Letters Patent.

Patented June 23, 1914.

Application filed November 10, 1913. Serial N 0. 800,172.

To all whom it may concern Be it known that I, KARL AUGUST BRKU- NING, a subject of Germany, and resident of Herstal, in the Kingdom of Belgium, have invented certain new and useful Improvements in Fixing Means for the Sights of Firearms; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters or figures of reference marked thereon, which form a part of this specification.

The sights of military rifles are generally secured to the barrel by soldering or brazing. This method does not allow the sight to be removed and replaced, and on the other hand under the action of repeated firing the said soldering frequently yields.

This invention obviates the disadvantages in question by a method of fixing without any soldering.

The accompanying drawings show the application of the invention to a sight of the type described in Letters Patent No. 1,070,767, but it is obvious that the invention is applicable to any sight comprising one or more sleeves through which the barrel passes.

Figure 1 is a longitudinal section, Fig. 2 a cross-section on line AB of Fig. 1, the sight bar and its lide being assumed to have been removed. Fig. 3 is a section of the barrel itself (on line CD of Fig. 1). Fig. 4: shows the barrel surrounded by the sight bed, the said bed being shown in section. Fig. 5 is a longitudinal section of the front part of the barrel and Fig. 6 a cross-section on line EF of Fig. 5.

The sight bed 1 is provided in its lower surface with grooves with which engage ribs 3 arranged on the upper part of the barrel 2. The sleeve 4 connected to the bed 1, has in front a slightly larger diameter than the outer diameter of the barrel 2, so as to enable the said barrel to be slightly inclined in the interior of the said sleeve. The rear sleeve 5 has an inside diameter equal to the outside diameter of a shoulder 6 on the barrel. The diameter of the said shoulder is equal to, or greater than, the diameter of the barrel 2 plus the height of the r1b 3. The rotation of the sight around the barrel 2 is normally prevented by the engagement,

with a longitudinal groove 7 in the barrel, of a projection 8 on a spring blade 9 controllmg the sight bar 10. The said spring blade 9 engages at the bottom with grooves 11.

When the parts are in the position shown in Fig. 1, in order to separate the sight from the barrel, the sight bar 10 and its slide 12 are removed by removing the pin 13. The spring blade is then removed by sliding it forward. The barrel can then be rotated in the sleeves 1 and 5. By a rotation of about 180, the ribs 3 of the barrel are disengaged from the corresponding grooves of the base 1. The sight can then be moved forward, and the barrel, surmounted by its ribs 3, can pass into the sleeve 5 as the outer diameter of the said sleeve is equal to, or greater than, the diameter of the barrel 2 plus the height of its ribs. In order to enable the sight to be entirely removed, it is obviously necessary to pass it beyond the fore-sight. This fore-sight being generally fairly high, it would not be possible to pass the barrel surmounted by the said fore-sight through the sleeves 4 and 5. In order to avoid this disadvantage, the foresight proper 13 is secured to the barrel by means of the following device: A block 14 integral with the barrel is provided with grooves of dovetail shape in cross-section (Fig. 5) and circular in longitudinal section (Fig. 6). The center of curvature of the said grooves coincides with the axis of the barrel. The fore-sight 13 is provided with corresponding ribs 15 movable stiflly in the groove of the block 14. When it is desired to withdraw the sight and pass it over the muzzle, the fore-sight 13 is first removed by turning it about the center of the barrel until it is disengaged from the latter. The sleeves 4 and 5 can then be moved beyond the muzzle as the minimum inside diameter of the said sleeves is greater than the diameter of the barrel at the muzzle plus the block 14.

Claims.

1. In fixing means for the back-sights of fire-arms, the combination with a gun barrel of a sight-bed, of sleeves provided in said sight bed and adapted to surround the barrel, of ribs on the barrel adapted to engage with the sight-bed and to disengage therefrom when the barrel is rotated.

2. In fixing means for the back-sights of fire-arms, the combination with a gun barrel having a longitudinal groove of a of the sight engaging with the groove in the i said barrel.

In testimony whereof I aflix my signature in presence of two witnesses.

KARL AUGUST BRAUNING.

Witnesses:

GEORGE VANDER HAEGHEN, LEONARD LEVA.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Iatents, Washington, D. 0. 

